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Hi,I am studying this sonata and I have two versions.While they are basically the same (the second version is the gruppetto written out), the second version gives a suggestion above the staff that I wouldn't have spontaneously chosen I think.Besides, dynamics etc. are also different...Here they are:

What do you think?And is there something like Mozart's First Editions Online?I think I will have to buy the Urtext Edition if I want to be sure...

Someone here must have a copy of an Urtext ... I actually have the Henle edition on hold at the library so I'll look there when I can pick it up if nobody else has. Of course the dynamics are very likely editorial which would explain the difference.

The suggestion for the grupetto, though, looks exactly how I would have expected it to be given that it's written after the dotted eighth note. For a simple example:

The first 20 measures are very similar to the top picture in your post, where the turns are written out as a set of sixteenth note appogiaturas. I think that is what they are called. Visually, the set of sixteenth notes are smaller than the rest of the notes.

From measures 21 - 40, my score shows an erstdruck version in parallel with the autograph. Most of the appogiaturas in the erstdruck section follow the 4 sixteenth note style, with several exceptions (m24 and m27 uses the triplet version: I don't know what it is called, but has the double beam connecting 3 notes, and an italicized 3 below the double beam)

Basically the erstdruck version writes out the ornaments and the different variations for them, and the variations get successively more tricky, for me at least. I actually submitted this movement in the recent ABF forum recital and I tried to execute the erstdruck. Function term here is "tried".

As far as dynamics go, no crescendo or decrecendo phrase markings; all dynamic markings are written as p, sfp, sp etc directly below the note.